Gas-mixture-state estimation apparatus for internal combustion engine and emission-generation-amount estimation apparatus
US7848871B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2006 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Aug 29, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This apparatus equally divides an injection period TAU into three periods; i.e., front, intermediate, and rear periods, and assumes that first injection (mass Q(1)) corresponding to the “front period” is executed at one time at a fuel injection start timing, second injection (mass Q(2)) corresponding to the “intermediate period” is executed at one time when ⅓ TAU has elapsed after the first injection, and third injection (mass Q(3)) corresponding to the “rear period” is executed at one time when ⅓ TAU has elapsed after the second injection. A first gas mixture based on the first injection, a second gas mixture based on the second injection, and a third gas mixture based on the third injection are individually handled, and the excess air ratio of gas mixture, the state (temperature, etc.) of gas mixture, and the emission generation amounts in gas mixture are estimated for each gas mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.